302 



THE UNIVERSE. 



terecl about; internally it is lined with a compact coating 

 of earth, on which the brood lie naked, as if the parents 



%'^T i* 





^l)\^^\'x" 





173. Nest of the Oven-bird — Furnarius rufus (Vieillot). — From the Eouen Museum. 



dreaded the effect which the heat of down Avould have 

 upon them. This bird is therefore only half a mason. 



We have, at the beginning of this chapter, seen that 

 there is a palmipede which hollows out an oven. An 



